dam rehabilitation and improvement project (drip)the manimuthar dam is constructed across manimuthar...

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Date: Signature of Project Director, SPMU

Dam Rehabilitation and Improvement Project (DRIP)

(Project Assisted by the World Bank, and Coordinated and Supervised by the Central Water Commission)

Project Template

Name of the Project : MANIMUTHAR DAM

Name of SPMU : TAMIL NADU SPMU

Month & Year : JUNE 2013

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INDEX

FORM-I: PROJECT DETAILS ....................................................................................................................................................................... 4

1. PROJECT DESCRIPTION ........................................................................................................................................................................... 4 2. PROJECT LOCATION ............................................................................................................................................................................... 4 3. PROJECT BENEFITS ................................................................................................................................................................................ 4 4. PROJECT OWNERSHIP DETAILS ................................................................................................................................................................. 5

APPENDIX - IA.......................................................................................................................................................................................... 6

LOCATION MAP OF PROJECT................................................................................................................................................................. 6

APPENDIX-IB ..........................................................................................................................................................................................10

GENERAL LAYOUT PLAN OF THE PROJECT.............................................................................................................................................10 FORM-II: DAM SPECIFIC DETAILS..........................................................................................................................................................12 1. DAM FEATURES ...................................................................................................................................................................................12 2. RESERVOIR FEATURES: ..........................................................................................................................................................................14 3. CONSTRUCTION ASPECTS .......................................................................................................................................................................14 4. OPERATIONAL ASPECTS .........................................................................................................................................................................15 5. INSTRUMENTATION ASPECTS...................................................................................................................................................................17 6. PREVIOUS REHABILITATION EFFORTS ........................................................................................................................................................18 LONGITUDINAL SECTION OF THE DAM .................................................................................................................................................19

APPENDIX-IIB .........................................................................................................................................................................................21

TYPICAL CROSS SECTIONS OF THE DAM ................................................................................................................................................21

APPENDIX-IIC..........................................................................................................................................................................................27

REPORT ON DAM INSTRUMENTATION .................................................................................................................................................27

FORM-III: HEALTH STATUS OF DAMS ......................................................................................................................................................28

1. DESIGN FLOOD REVIEW (AS APPROVED BY CWC) ........................................................................................................................................29 2. DAM SAFETY REVIEW PANEL (DSRP) REVIEW.............................................................................................................................................29 3. SEISMIC REVIEW ..................................................................................................................................................................................30 4. PRESENT DISTRESS CONDITION ................................................................................................................................................................31 5. ANY OTHER DISTRESS CONDITIONS, IF ANY ................................................................................................................................................32

APPENDIX-IIIA ........................................................................................................................................................................................33

REPORT OF DESIGN FLOOD REVIEW .....................................................................................................................................................33

APPENDIX-IIIB ........................................................................................................................................................................................35

LATEST REPORT OF DAM SAFETY REVIEW PANEL (DSRP) .......................................................................................................................35

APPENDIX-IIIC.........................................................................................................................................................................................38

PHOTOGRAPHS SHOWING DISTRESS CONDITION .................................................................................................................................38

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FORM-IV: REHABILITATION PROPOSALS .................................................................................................................................................44

1. STRUCTURAL REHABILITATION MEASURES ..................................................................................................................................................44 2. NON-STRUCTURAL MEASURES ................................................................................................................................................................44 3. BASIC FACILITIE S ENHANCEMENT.............................................................................................................................................................45 4. TOURSIM/FISHERIES/HYDROPOWER DEVELOPMENT…………………………………………………………………………………………………………………………………………….. 43 5. LATEST ESTIMATED COST OF REHABILITATION PROPOSAL (IN RS.) ....................................................................................................................45

APPENDIX-IVA ........................................................................................................................................................................................46

COST ESTMATE OF REHABILITATION PROPOSAL ............................................................................................................................ 44-465

FORM-V: ENVIRONMENTAL AND SOCIAL MANAGEMENT FRAMEWORK (ESMF) COMPLAINCE ..............................................................47

1. IDENTIFICATION OF ACTIVITIES HAVING POTENTIAL ENVIRONMENTAL AND SOCIAL IMPACT (AS PER FORM SC_1 OF ESMF) ..........................................47 2. IDENTIFICATION OF ACTIVITIES HAVING POTENTIAL ENVIRONMENTAL AND SOCIAL IMPACT (AS PER FORM SC-2 OF ESMF) AND CATEGORIZATION (AS PER FORM

SC-4 OF ESMF) .....................................................................................................................................................................................48 3. WHETHER REQUIREMENT OF SPECIFIC ENVIRONMENT MANAGEMENT PLAN (EMP) PROPOSED………………………………………………………………………………49 4. WHETHER MITIGATION MEASURES HAVE BEEN IDENTIFIED AS PER FORM SC-5 ...................................................................................................51 5. WHETHER MITIGATION MEASURES ARE REQUIRED TO BE IMPLEMENTED BY CONTRACTOR .......................................................................................49

APPENDIX-VA .........................................................................................................................................................................................52

FORM SC-1:SCREENING OF ESMF ACTIVITIES ...........................................................................................................................................50-51

APPENDIX-VB .........................................................................................................................................................................................52

FORM SC-2: SCREENING OF COMPONENTS ....................................................................................................................................................52

APPENDIX-VC .........................................................................................................................................................................................55

FORM- SC-3: SCREENING OF ADVERSE (ENVIRONMENTAL AND SOCIAL) IMPACTS ............................................................................53-67

APPENDIX-VD .........................................................................................................................................................................................68

FORM SC-4: SCREENING AND CATEGORIZATION OF COMPONENTS .....................................................................................................................68

APPENDIX-VE..........................................................................................................................................................................................69

FORM SC - 5: SCREENING FORMAT FOR IDENTIFICATION OF SUITABLE MITIGATION MEASURES .......................................................69-77

FORM:VI – IMPLEMENTATION ARRANGEMENT .....................................................................................................................................80

1. CIVIL WORKS-MAIN PACKAGE ................................................................................................................................................................80 2. CIVIL WORKS-OTHER PACKAGES ..............................................................................................................................................................80 3. PROCUREMENT OF GOODS .....................................................................................................................................................................79 4. CONSULTANCY ASSIGNMENT...................................................................................................................................................................79 5. IMPLEMENTATION TIMELINE ...................................................................................................................................................................79

Note: This document has been prepared in MS Word 2007. The page numbers of the document are auto generated, and dynamically indexed. A new page at any location of the document can be created by command <Insert/ Page Break>. Page numbering in Index can then be updated by command <References/ Update Table>.

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FORM-I: PROJECT DETAILS

1. Project Description:

a. Project Identification Code (PIC): TN12HH0017

(As given in National Register of Large Dams)

b. Project Name: Manimuthar Dam

c. River Basin: Thambaraparani

d. Sub River Basin Manimuthar e. River/Stream: Manimuthar

2. Project Location:

a. State: Tamilnadu b. District: Tirunelveli

c. Earthquake Zone: II d. Survey of India Map Reference Nos. 58 H/10

e. Nearest City: Tirunelveli f. Nearest Airport: Tuticorin

g. Nearest Railhead: Kallidaikuruchii

h. Name of immediate u/s project: Nil

i. Name of immediate d/s project: Nil

3. Project Benefits:

a. Type of Project: Irrigation

b. Irrigation Benefits:

(i) Gross Command Area (GCA) (ha): 10355.80

(ii) Culturable Command Area (CCA) (ha): 10355.80

(iii) Annual Irrigation Potential (ha): 10355.80

Location Map of the Project is attached as Appendix-IA. General Layout Plan of the Project showing major project components is attached as Appendix-IB.

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c. Hydropower Benefits:

(i) Installed Capacity (MW): Nil (ii) Firm Power (MW): Nil

(iii) Average Annual Energy Generation (MU): Nil

d. Domestic/Municipal/Industrial Water Supply:

(i) Annual Quantum of Water Supply (MCM): Nil

(ii) Details of Area and Population Benefitted: Nil

e. Flood Protection:

(i) Flood Protected Area (ha): Nil

(ii) Details of Area Benefitted: Nil

f. Details of Tourism/Recreational Facilities: Nil

4. Project Ownership Details:

a. Name of Dam owning Agency/Department/Organization: TNWRD

b. Name of SPMU for DRIP Implementation: TAMILNADU SPMU

c. Name of Implementing Agency: TNWRD

d. Details of Dam in-charge:

(i) Name: Er. M.Muthupandian (ii) Designation: Executive Engineer, WRD

(iii) Phone No. (with STD Code): 0462 2574832

(iv) Fax No. 04622574232

(v) E mail: [email protected]

(vi) Contact Address: Thambaraparani Basin Division,WRD,Tirunelveli Pin:627002 Tamilnadu

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Appendix - IA

LOCATION MAP OF PROJECT

Comments of SPMU, if any:

(The location Map is furnished below this sheet.)

The Manimuthar Dam is constructed across Manimuthar river, a major

tributary of Thambaraparani river at Latitude 080 39’ 30” N and Longitude

770 26’ E in Manimuthar village, Ambasamudram taluk of Tirunelveli district

in Tamilnadu. It is 10 km away from Ambasamudram town which is

situated in Tirunelveli district. The nearest railhead is Kallidaikurichi which

is 7km from the dam site. The nearest airport is Tuticorin which can be

reached by road at a distance of 90 km.

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Appendix-IB

GENERAL LAYOUT PLAN OF THE PROJECT

Comments of SPMU, if any:

(The General layout map is furnished below this sheet)

The general layout plan is attached for reference.

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FORM-II: DAM SPECIFIC DETAILS

1. Dam Features:

a. Latitude at Dam Site (mid-point of axis): Degree 08 Minute 39 Second 30

b. Longitude at Dam Site (mid-point of axis): Degree 77 Minute 26 Second 00

c. Type: Masonry cum Earthern Dam

d Length of dam at Top (m): 2927.60 e. Width of Dam at Top (m): 3.66

f. Height above deepest foundation level (m): 45.73

g. Volume Content of Dam (103 m3): 4582

h. Main Spillway Arrangement:

(i) Type of Spillway: OGEE (ii) No. of Bays: 7

(iii) Type of Gate: Vertical

(iv) Size of Gate: Height (m) 12.19 Width (m) 4.57

(v) Total Spillway Capacity of all bays (m3/s): 1710 (vi) Gate Hoisting Arrangement: Vertical

(vii) Hoisting Capacity of Single Gate (T): 18

(viii) Energy Dissipation Arrangement: Stilling basin

i. Auxiliary Spillway Arrangement: Nil

(i) Type of Spillway: (ii) No. of Bays: -

(iii) Type of Gate:

(iv) Size of Gate: Height (m) - Width (m) -

(v) Total Spillway Capacity of all bays (m3/s): -

(vi) Gate Hoisting Arrangement: -

(vii) Hoisting Capacity of Single Gate (T): -

(viii) Energy Dissipation Arrangement: -

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j. Under Sluice Arrangement:

(i) No. of Sluices: 4

(ii) Size of Sluice: Height (m) 1.52 Width (m) 1.83 Dia (m) -

(iii) Maximum Head (m): 35.96

(iv) Discharge Capacity of Sluice (m3/s): -

(v) Type of Gate: Service gate with Screw gearing arrangements

(vi) Type of Hoist: Emergency gate with gantry crane arrangements

(vii) Capacity of Hoist (T): 5

(viii) Year of last operation, if not operated regularly: Regularly

k. Details of Outlet works): 1.Main Canal Sluice-3 Vents of size(1.52m x1.83m )

2.Perungal Channel Head Sluice-1 No. of Vent size of 1.52m x 1.83m

3.Odai Sluice -1 No. of Vent of Size of (0.91m x0.91m)

Longitudinal section of the dam is attached as Appendix-IIA

Typical non-overflow/overflow/other cross sections of the dam is attached as Appendix-IIB (1)/(2)….

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2. Reservoir Features:

a. Catchment Area at Dam site (km2): 161.62 b. Maximum Water Level (m): +35.96

c. Full Reservoir Level (m): +35.96

d. Minimum Draw Down Level (m): +0.00 e. Dead Storage Level (m): Nil

f. Outlet Levels, if any, specify: - g. Live Storage Capacity (Mm3): 156.07

h. Gross Storage Capacity (Mm3) at FRL: 156.07

i. Reservoir Spread Area (km2) at FRL: 9.398

3. Construction Aspects:

a. Date of Starting the Construction: 1951

b. Date of Completion: 1958

c. Name of Designing Agency: WRD

d. Name of Construction Agency: WRD

e. Major accidental events/incidents if any, during construction (brief description):

Nil

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4. Operational Aspects:

a. Date of first full impoundment:1961

b. Whether Pre & Post monsoon inspection being carried out : Yes

c. Major recommendations of dam safety inspection, along with brief status on compliance:

(For each major recommendation details are given as under separate number)

1 Necessary Retaining wall should be constructed resting on hard rock on the upstream of Perungal sluice at the left side and back filled with suitable material to prevent further sliding of rock boulders and to facilitate proper approach to the Sluice operating operation

2. Similarly the rock cut slope at the right side shall be protected by rock bolting shotcreting to sliding of rock boulders.

3. The cracks in the walls of river sluices portion shall be sealed.

4.Abnormal seepage found in shaft no. 33 and 35 of masonry dam near river sluice vents 2 and 4 by grouting the body wall of the dam besides upstream face treatment.

5. Grouting shall be carried out to control the dampness in masonry dam in block 6 and 7.

5. For installation, maintenance and taking measurement in the “V” notches the guidelines annexed with this report should be followed.

6. Leached deposits on the floor and gutter of the gallery should be cleaned .

7 Instrumentation are to be provided.

8. Chocked porus drains should be reamed.

9.The blockages in the chutes should be reamed and damaged chutes should reconstructed.

10. .Damage parapet wall should be reconstructed.

11. Disturbed rip rap in upstream slope of earth dam is to be removed and repacked.

12. Bitumin access road is to be improved in the left out portions.

13. Worn out rubber seal of outlet gates to be renewed.

14.Communication facilities should be reviewed.

15. Emergency action plan should be reviewed .

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Health status report

Health Status Report of Tamilnadu WRD Dams for the Monsoon – I Period (10th June 2012 to 15th August 2012) Madurai Region

GENERAL

1. Health status report is prepared based on the deficiencies pointed out by the inspecting officer in the monsoon report. The deficiencies are noted in descending order priority wise. They may be attended and rectified accordingly.

2. Field officers were requested to report the action taken on the review remarks communicated to them on the previous monsoon reports and enclose the same while sending the subsequent report. The instructions given were carried out in respect of few dams only. So the action taken report for the previous monsoon reports must be enclosed by the field officers in future while sending the subsequent monsoon reports.

3. As per the ICOLD,

The height of dam = Top of dam – Deepest foundation level.

Accordingly find out the deepest foundation level of the masonry dam from the as built drawings and the height of the dam has to be reckoned from the deepest foundation level. 4. All the as built drawings of the components of the dam have to be kept ready for inspection and also for references. I. Dams with Major Deficiency 1) Manimuthar Dam in Tirunelveli District.:

1. Actions shall be taken to arrest the abnormal seepage reported in shaft no.33 and 35 of masonry dam near river sluice vents 2 & 4 by grouting the body wall of the dam besides upstream face treatment. 2. Grouting shall be carried out to control the dampness in masonry dam in block no.6 & 7 (LS 5879 ft to 6059 ft.) 3. Disturbed rip rap in upstream slope of the earth dam is to be removed and repacked. 4. Bitumen access road is to be improved in the left out portions. 5. Worn out rubber seal of river sluice shutter is to be renewed. 6. Instrumentations are to be provided. 7. Collapsed chutes should be reconstructed. 8. ‘V’ Notches are to be repaired and measurements should be taken regularly. 9. Exact deficiency in the earth dam slope should be reported in the relevant column of the bund. 10. Communication facilities should be improved. 11. Worn out rubber seal of outlet gate is to be renewed. 12. Emergency action plan should be reviewed every year. 13. Weather station instruments are to be repaired and should be brought to working condition.

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d. Major accidental events/incidents if any, during project operation with brief statement of

remedial measures:

5. Instrumentation Aspects:

a. List of Instrumentations installed in the Dam:

b. Conditions of Instruments:

c. Frequency of Observations:

Nil

(1) Plump line – 1 No.

(2) Thermometer - 6 Nos.

(3) Pore Pressure cell – 6 Nos.

(4) Stress meters-4 Nos.

(5) Joint meters – 4 Nos.


(7) Uplift Pressures - 5 Nos.

All the following instruments are not in working condition.

(1) Plumb line – 1 No.






(7) Uplift Pressure Gauge - 5 Nos.

Nil

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d. Comments on adequacy and justification for additional instrumentation:

6. Previous Rehabilitation Efforts:

a. a. Name of Scheme:

b. Period of Scheme: From to

c. Details of Works Carried Out:

(Give details for each work under separate number)

d. Cost of Rehabilitation (in Rupees):

Appendix-IIA

1) Solar Energy system

2) For communication facility LAN, WAN

3) Automatic Digital Water Level Recorder

4) Automatic Weather Station

5) Instrumentation such as siren, Uplift Pressure gauge, V- Notch, etc.,

A separate report on instrumentation including instrumentation drawings, readings, conditions of instruments, observations, and conclusions based upon collected data is attached as Appendix -2C

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LONGITUDINAL SECTION OF THE DAM

Comments of SPMU, If any:

(L-section Drawing of Dam is furnished below this sheet.)

Manimuthar Dam bund is 2927.60 m long. The crest level of the spillway is

+104.55M which has 7 vents of size 12.19m x 4.57 m, River sluice has 4 nos. of vent

size 1.52 m x 1.83 m and its sill level is +73.15M, Main Canal is having 3 Nos. of vent

of size 1.52 m x 1.83 m and its sill level is +97.54M, Perungal head sluice is having 1

No. of vent of size 1.52 m x 1.83 m with the sill level @+86.72M, and Odai sluice is

having 1 No. of size 0.91 m x 0.91 m with its sill level at +97.23 M. Top of bund level

(TBL) is (+) 112.17 m.

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Appendix-IIB

TYPICAL CROSS SECTIONS OF THE DAM

Comments of SPMU, If any:

(The Cross-Sections Drawing of Dam is enclosed as under below)

The Manimuthar Dam is Masonry cum Earth dam having a total bund length of

2927.60 m. The masonry portion is 374.90 m long and the earthen portion is 2552.70 m

comprising Left flank of 1665.00 m and Right flank of 889.00 m. The Masonry portion

consists of 14 blocks with a spillway length of 101.83m. The spillway portion comprises

of 4 blocks from block 7 to 10.The FRL and MWL is +35.96 M. The width of the masonry

dam at crest is 3.65 m and the width at the bottom is 232.77m for the deepest section.

The height of masonry dam at the deepest level is 45.73m and that of the earthen dam is

38.0m.

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SPILLWAY SECTION

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NON SPILLWAY SECTION

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EARTHERN DAM

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RIVER SLUICE

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Appendix-IIC

REPORT ON DAM INSTRUMENTATION

Comments of SPMU on the Instrumentation Report, If any:

(The full report is placed below this page.)

Report on Instrumentation

Enclosed (Yes/No): Yes

It is reported that the instruments available in the dam are not in working condition.

Necessary provisions are given in the DRIP estimate for the following additional instruments required for the dam:-





5) Instrumentation

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The following instruments available in the Dam are not in working condition.

(1) Plumb line – 1 No.






(7) Uplift Pressure Gauge - 5 Nos.

The following additional instruments are required for the dam for which necessary

provisions are given in the DRIP estimate:-





5) Instrumentation such as V notch, siren, uplift pressure gauge,etc.,

FORM-III: HEALTH STATUS OF DAMS

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1. Design Flood Review (As approved by CWC):

a. Original Design Flood (m3/s): 1699.20

b. Date of Latest Review: 04.01.2013

c. Revised Design Flood (m3/s): 4969

2. Dam Safety Review Panel (DSRP) Review:

a. Date of Latest Review: 27.11.2012

b. Key actionable points for rehabilitation:

The Report of Design Flood Review is enclosed as Appendix -IIIA

1. In the perungal sluice channel at the collapsed slope, a concrete toe wall of 2m height with nominal reinforcement may be provided and the portion above the toe wall should be dressed to a proper slope with a adequate provisions for surface drainage. The slope may be protected with rip rap and drainage holes at 3m interval (staggered) be drilled. A perforated pipe may be placed within the drilled holes to drain out underground water.

2. Damaged chutes to be repaired.

3. Damaged parapet wall is to be restored.

4. Reaming the porous drain near the gallery

5. The upstream face to be cleaned and the joints should be racked and pointing to be done in cement mortar by mixing synthetic sealant.

The latest report of DSRP is enclosed as Appendix-IIIB

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3. Seismic Review:

a. Seismic Zone at the time of Design: II

b. Revised Seismic Zone: II

c. Historical significant earthquake events in the near vicinity:

Event 1: Date: NIL Epicenter: NIL

Magnitude: NIL

Event 2: Date: NIL Epicenter: NIL

Magnitude: NIL

d. Details of nearest project whose site specific seismic parameter study has been approved by

National Committee on Seismic Design Parameter (NCSDP):NA

(i) Name of Project: Nil

(ii) Date of Approval: Nil

(iii) Approved Parameter: Maximum Credible Earthquake (MCE): Nil

Design Basis Earthquake (DBE): Nil

Seismic Design Coefficient (Horizontal): Nil

e. Whether need for seismic design review: NIL

f. Micro seismic activity, if any

g. Reservoir Induced Seismicity (RIS)/Reservoir Triggered Seismicity (RTS), if any

NIL

NIL

NIL

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4. Present Distress Condition:

Sl No.

Description Earthen Masonry Concrete Composite

1 Leakage through dam body Yes 2 Excessive seepage through dam body Yes 3 Excessive seepage through foundation No 4 Excessive settlement of dam body? No 5 Clogging of drains holes? No 6 Undesirable vegetation? Yes 7 Deteriorated Concrete-Facing, Outlet,

Spillway No

8 Erosion of surfaces, slides & signs of movement

Yes

9 Are there any surface cracks? No 10 Adequate slope protection? Yes 11 Erosion of the upstream/downstream face? No 12 Animal Burrows? Yes 13 Any evidence of piping through dam body? Yes 14 Any evidence of piping through foundation No 14 Are there wet spots or areas on the

downstream face, at the toe, or beyond the dam?

No

15 Spillway surface erosion? No 16 Can water flow into the principal spillway

without difficulty, as intended when constructed?

Yes

17 Is the primary spillway structure in good condition?

Yes

18 If there are foundation drain outlets, are they clear and flowing?

No

20 Is there any unusual movement or cracking at or beyond the toe?

No

21 Is there any evidence of instability on the slopes around the reservoir?

No

22 Is a lot of sediment entering the reservoir, or has this happened in the past?

No

23 Are gates/stop logs/valves and other operating equipments in working conditions?

Yes

24 Is the drainage gallery easily accessible and does it have adequate lighting facilities?

Yes

25 Gate corrosion Yes 26 Are Gate Seals showing signs of weathering,

cracking or tearing? Yes

27 Is the surface of gates and paint deteriorated?

Yes

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Sl No.

Description Earthen Masonry Concrete Composite

28 Is the alternative power system for gate operation working properly?

Yes

29 Are the hydraulic hoists working satisfactorily?

No

30 Are the decking, girders and structural supports of spillway bridge, hoist bridge and catwalks structurally sound?

Yes

31 Is the floor of the bridge structurally sound and safe?

Yes

32 Is the concrete surface of the stilling basin and apron in good condition?

Yes

33 Is access road to dam site well maintained? No 34 Are communication facilities available at dam

site? No

35 Whether there is a standby power supply? Yes 36 Is fencing of project area

required/strengthen? Yes

37 Is sufficient stock of spare which needs frequent replacement maintained at the site?

Yes

38 Are the instruments installed properly accessible?

Yes

39 Are all the instruments in proper working condition?

No

40 Need for repair of instrument Yes 41 Need for replacing instruments Yes

42 Need for additional instruments Yes

43 Need for Stability Analysis No 44 Need for E/Q design review No 45 Need for operational review No 46 Need for pumping arrangement in Drainage

Gallery Yes

5. Any Other Distress Conditions, if any:

Photographs showing details of location and nature of distress conditions as Appendix-IIIC

Nil

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Appendix-IIIA

REPORT OF DESIGN FLOOD REVIEW

Comments of SPMU on report of design flood review, if any:


Enclosed - Yes

The dam is designed for the flood discharge of 1699.2 Cumecs. The Central

Water Commission has approved the revised flood discharge of 4969

Cumecs.

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Appendix-IIIB

LATEST REPORT OF DAM SAFETY REVIEW PANEL (DSRP)

Comments of SPMU on report of DSRP, if any:


Enclosed (Yes/No): Yes

Necessary provisions have been made in this DRIP estimate for the following DSRP recommendations:-

1. In the Perungal sluice channel at the collapsed slope, a concrete toe wall of 2 M height with normal reinforcement may be provided and the portion above the toe wall should be dressed to a proper slope with a adequate provisions for surface drainage. The slope may be protected with a adequate rip rap and drainage holes at 3 M interval (staggered) be drilled. A perforated pipe may be placed within the drilled holes to drain out underground water.

2. Wherever chutes are damaged they may be repaired.

3. Wherever the parapet wall is cracked / damaged, it may be restored.

4. If possible the porus drains near the gallery may be reamed and cleaned.

5. In the blocks where heavy seepage is observed in the upstream face should be cleaned and joints should be racked and pointing be done in cement mortar by mixing synthetic sealant. If possible, whole upstream face may be pointed.

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Appendix-IIIC

PHOTOGRAPHS SHOWING DISTRESS CONDITION

Sl No.

Date of Photograph

Description with details of location, nature of distress and other remarks

1 27/08/2012 Damaged Road. 2 27/08/2012 Sliding hard rock boulders in upstream of Perungal sluice. 3 27/08/2012 Fallen rock in the cut and cover of downstream of Perungal

Sluice. 4 27/08/2012 Damaged Chute Eroded Bund. 5 27/08/2012 Excess Seepage Gallery 6 27/08/2012 Eroded earthen bund 7 28/08/2012 Damaged Parapet wall. 8 28/08/2012 Damaged “V” notches in the toe drain. 9 28/08/2012 Silted Toe drain

10 28/08/2012 Damaged condition of Rip Rap

(Two Photographs per plate indicating the Sl. No.is attached as below)

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1. DAMAGED ROAD.

2. SLIDING HARDROCK BOULDERS IN UPSTREAM OF PERUNGAL SLUICE.

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3. FALLEN ROCK IN THE CUT AND COVER OF DOWNSTREAM OF PERUNGAL SLUICE

4. DAMAGED CHUTE

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5. EXCESS SEEPAGE IN GALLERY

6. ERODED EARTHERN BUND

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7. DAMAGED PARAPET WALL.

8. DAMAGED “V” NOTCHES IN THE TOE DRAIN

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9. SILTED TOE DRAIN

10. DAMAGED CONDITION OF RIP RAP

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FORM-IV: REHABILITATION PROPOSALS 1. Structural Rehabilitation Measures:

(List all the items identified for the structural rehabilitation)

(Details for each structural measure is given as under separate number)

2. Non-structural Measures:

(List out such proposed non-structural measures as: Revision of Reservoir Operation Parameters, Preparation of Emergency Action Plan (EAP), Setting up of Warning System, Real-time Inflow Forecasting System, Catchment Area Treatment, Carry out Risk Analysis etc.)

(For each facility details are as under separate number)

1) Strengthening the Earth Dam

2) Repairs to revetment/ rip -rap in u/s face

3) Repairs to the existing damaged portion of chutes and Parapet wall 4) Repairs to Toe Drain.

5) Turfing on D/S

6) U/S face treatment with synthetic sealant. 7) Spillway treatment

8) Reaming the drainage shaft 9) Vertical grouting

10) Uplift pressure gauge 11) Retaining wall at upstream of Perungal Head sluice

1. Automatic Weather station

2. Instrumentation

3. LAN WAN to Dams

3. Automatic Digital Water level recorder

4. Solar Energy system

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3. Basic Facilities Enhancement:

(List out such proposed basic facilities as: Construction and Improvement of approach roads, Construction and Improvement of Bridges and Culverts, Construction and Improvement of Fencing, Forest area / vegetation clearance, Improving office housing and related accommodation, stockpiling of emergency materials etc.)

(For each facility details are as under separate number)

4. Tourism/Fisheries/Hydropower Development:

5. Latest Estimated Cost of Rehabilitation Proposal (in Rs.): 179666000

1. Special repairs to approach road to dam and road on top of dam

2. Special repairs to Service road to gallery and toe drain etc

3. Repairing, renewing and providing the necessary electrical arrangements

Nil

Cost Estimate of Rehabilitation proposals is attached as Appendix-IVA

Details of Work Packages/Consulting assignment/Procurement of Goods, Works etc.is attached as Appendix -IVB

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Appendix-IVA

COST ESTMATE OF REHABILITATION PROPOSAL

Comments on Cost Estimate of Rehabilitation Proposal, if any:

(The cost estimate is furnished below this page.)

The cost estimate for Rs. 1796.66 lakhs is prepared based on the schedule of rate for the year 2012 - 2013.

47


Cost Estimate

Name of Work: Rehabilitation and Improvement to Manimuthar Dam of WRD in Tirunelveli District of Tamil Nadu under Phase I of DRIP

S. No

Description Amount (Rs. in Lakh)

Remedial Works

1 Special repairs to approach road to dam and road on top of dam

83.00

2 Special repairs to Service road to gallery and toe drain etc 45.01

3 Standby generators 5.04

4 Drainage pumps 1.00

5 Fire extinguisher 0.92

6 Strengthening of earthen bund including jungle removal / jungle clearance

50.00

7 Repairs to revetment/ rip -rap in u/s face 38.99

8 Repairs to the existing damaged portion of chutes and Parapet wall

85.00

9 Repairs to toe drain 15.14

10 Turfing on D/S 22.00

11 U/S face treatment with synthetic sealant. 862.69

12 Spillway treatment 21.50

13 Reaming the drainage shaft 79.00

14 Vertical grouting 21.00

15 Uplift pressure gauge 1.20

16 Retaining wall at upstream of Perungal Head sluice 13.00

17 Repairing, renewing and providing the necessary electrical arrangements

25.00

48


Sl. No. Description Amount

(Rs. in Lakh)

Basic Facilities

18 Providing Automatic weather station 10.00

19 Providing Instrumentation to dam 10.00

20 Providing Communication Facilities-LAN-WAN to dams

8.40

21 Provision for Automatic Digital Water Level Recorder in Dam including implementation for three instruments

35.00

22 Provision for solar energy system - lighting to top of the bund, gallery. 50.00

23 Repairs/ replacement of shutter with rubber seals 47.00

24 Repairs/ renewal of hoisting arrangements 23.00

General

25 Provision for advertisement charges 13.69

26 Provision for documentation, Photographic and Video charges 6.85

27 Provision for Labour Welfare fund @0.3% 4.11

28 Provision for Petty supervision charges, unforseen & Contingencies @ 2.5% 34.24

29 Provision for Price adjustment charges 68.48

30 Provision for audit and accounts @ 1% 13.69

31 Provision for escalation charges 102.71

Total 1796.66

(Rupees One thousand seven hundred ninety six lakh and sixty six thousands only)

49


FORM-V: ENVIRONMENTAL AND SOCIAL MANAGEMENT FRAMEWORK (ESMF) COMPLAINCE

1. Identification of activities having potential environmental and social impact (as per FORM SC_1 of ESMF):

1. Approach road, dam crest roads, etc. construction / improvement

2. Standby Generator

3. Flood protection network

4. Wind Mill & Solar Power

5. Treatment of leakage through masonry and concrete dams and reduction of seepage through earth dams and their foundations

6. Remodeling earth dams to safe, stable cross sections

7. Improving toe drain and seepage measuring devices

8. Repairs to damaged spillways, stilling basins and downstream channels

9. Improving dam safety instrumentation

10. Improving communications – real-time as much as possible – between dams, upstream rain/river flow gauging stations and with other dams, control offices and civil authorities in flood plains downstream of the dam

11. Improving lighting for external areas of dams

12. Rehabilitation / Improvement of Spillway, head regulator and draw-off gates and their operating mechanisms

13. Cleaning of foundation drain & porous drain

Completed FORM SC-1is enclosed as Appendix-VA

50


2. Identification of activities having potential environmental and social impact (as per Form SC-2 of ESMF) and categorization (as per Form SC-4 of ESMF)

Components Categorization

1.Labour Camps B 2. Material handling and storage B 3. Heavy machinery B 4. Hot mix plant B 5. Concrete mixture and heavy pumps B 6. Debris Disposal B 7.Haulage of machinery B 8.Tree felling/Vegetation clearance B 9. Transport of materials B 10. Small tools and pumps c 11. Sheds to keep machines and tools c

Completed FORM SC-2, SC-3, SC-4 is enclosed as Appendix-VB, Appendix-VC and Appendix- VD.

51


3. Whether Requirement of Specific Environment Management Plan (EMP) proposed:No a) If Yes, tentative time frame of ESMF Study: NA

From: NA To: NA

4. Whether mitigation measures have been identified as per FORM SC-5: Yes s

5. Whether mitigation measures are required to be implemented by Contractor: Yes s

Completed FORM SC-5 is enclosed as Appendix- VE

52


Appendix-VA

Form SC-1:Screening of ESMF Activities Sl. No ESMF activity Put mark if

applicable Responsibility

1. Reservoir Desiltation

Executive Engineer, WRD,

Thambara- -parani Basin

Division, Tirunelveli

2. Tourism Development


√

4. Hydropower Generation

5. Standby Generator √

6. River Regradation

7. Flood Protection Network √

8. Wind Mill & Solar Power √


√

10. Improving Dam Drainage

11. Structural strengthening of dams to withstand higher earthquake loads

12. Remodeling earth dams to safe, stable cross sections √

13. Improving toe drain and seepage measuring devices √

14. Improving ability to withstand higher floods including additional flood handling facilities, if needed.


√

16. Improving dam safety instrumentation √

17. Improving communications – real-time as much as possible – between dams, upstream rain/river flow gauging stations and with other dams, control offices and civil authorities in flood plains downstream of the dam

√

18. Flood marking

53


Sl. No ESMF activity Put mark if

applicable Responsibility

19. Low voltage electrical supplies inspection and drainage galleries

20. Improving lighting for external areas of dams √

21. Inspection launches provision


√

23. Repair / Modification of Spillway Gates

24. Cleaning of foundation drain & porous drain √

25. Repair and cleaning of irrigation outlets

54


Appendix-VB

Form SC-2: Screening of Components Sl. No

Components associated with ESMF activity

Put mark if applicable Responsibility

1. Acquisition of forest land --

Executive Engineer, WRD, Thambraparani Basin Division,

Tirunelveli

2. Borrow materials/ area --

3. Quarry materials / area --

4. Blasting --

5. Dredging/Desiltation --

6. Resettlement and Rehabilitation --

7. Labour Camps √

8. Heavy machinery √

9. Hot mix plant √

10. Concrete mixture and heavy pumps √

11. Material handling and storage √

12. Temporary land acquisition --

13. Tree felling/ vegetation clearance √

14. Haulage of machinery √

15. Debris Disposal √

16. Transport of materials √ 17. Small tools and pumps √ 18. Sheds to keep machines and tools √

55


Appendix-VC

FORM- SC-3: SCREENING OF ADVERSE (ENVIRONMENTAL AND SOCIAL) IMPACTS

Activity Component Impact I P


1. Acquisition of forest land

2. Borrow materials/ area

3. Quary materials / area

4. Blasting

5. Dredging/Desiltation

6. Resettlement And Rehabilitation

√ 7. Labour Camps Worker local People Exposure √

Impact on human health (Labour Camps)

√

√ 8. Heavy machinery Air / Noise Pollution √

Soil Pollution √

Worker local People Exposure √

√ 9. Hot mix plant Air / Noise Pollution √

Soil Pollution √


√ 10.Concrete mixture and heavy pumps

Air / Noise Pollution √

Soil Pollution √


√ 11.Material handling and storage


Soil Pollution √


12.Temporary land acquisition

13.Tree felling/ vegetation

56



clearance

√ 14.Haulage of machinery Air / Noise Pollution √

Soil Pollution √


√ 15. Debris Disposal Air / Noise Pollution √

Soil Pollution √


Landscape Degradation √

Water Pollution (Surface) √

√ 16.Transport of materials Air / Noise Pollution √

Soil Pollution √


√ 17.Small tools and pumps Air / Noise Pollution √

√ 18.Sheds to keep machines and tools


2. Standby generator




4. Blasting



7. Labour Camps

√ 8. Heavy machinery Air / Noise Pollution √ √

Soil Pollution √


9. Hot mix plant

10.Concrete mixture and heavy

57



pumps

11.Material handling and storage


13.Tree felling/ vegetation clearance


Soil Pollution √


15. Debris Disposal Air / Noise Pollution

Soil Pollution

Worker local People Exposure

Landscape Degradation

Water Pollution (Surface)


Soil Pollution √





3. Flood Protection Network




4. Blasting



7. Labour Camps

58



8. Heavy machinery

9. Hot mix plant

10.Concrete mixture and heavy pumps

11.Material handling and storage



14.Haulage of machinery

15. Debris Disposal


Soil Pollution √





4. Wind mill, Solar power




4. Blasting





√


Soil Pollution √

59




9. Hot mix plant



Soil Pollution √




Soil Pollution √





Soil Pollution √



Soil Pollution √





Soil Pollution √









4. Blasting



60



√ Labour Camps Worker local People Exposure √


√


Soil Pollution √


9. Hot mix plant



Soil Pollution √




Soil Pollution √





Soil Pollution √



Soil Pollution √





Soil Pollution √


61






6. Remodeling earth dams to safe, stable cross sections




4. Blasting





√


Soil Pollution √


9. Hot mix plant



Soil Pollution √




Soil Pollution √






Soil Pollution √

62





Soil Pollution √





Soil Pollution √





7. Improving toe drain and seepage measuring devices




4. Blasting



7. Labour Camps

8. Heavy machinery

9. Hot mix plant



Soil Pollution √




Soil Pollution √


63







Soil Pollution √



Soil Pollution √





Soil Pollution √









4. Blasting





√

8. Heavy machinery

64



9. Hot mix plant



Soil Pollution √




Soil Pollution √




14.Haulage of machinery


Soil Pollution √





Soil Pollution √





9. Improving dam safety instrumentation




4. Blasting


65




7. Labour Camps

8. Heavy machinery

9. Hot mix plant

10. Concrete mixture and heavy pumps

√ 11. Material handling and storage


Soil Pollution √


12. Temporary land acquisition

13. Tree felling/ vegetation clearance

14. Haulage of machinery

15. Debris Disposal

√ 16. Transport of materials Air / Noise Pollution √

Soil Pollution √


√ 17. Small tools and pumps Air / Noise Pollution √

√ 18. Sheds to keep machines and tools


10. Improving communications – real-time as much as possible – between dams, upstream rain/river flow gauging stations and with other dams, control offices and civil authorities




4. Blasting



7. Labour Camps

8. Heavy machinery

66



in flood plains downstream of the dam

9. Hot mix plant




Soil Pollution √





15. Debris Disposal


Soil Pollution √





11. Improving lighting for external areas of dams




4. Blasting



7. Labour Camps

8. Heavy machinery

9. Hot mix plant


67



11. Material handling and storage




15. Debris Disposal









4. Blasting





√

8. Heavy machinery Air / Noise Pollution

Soil Pollution


9. Hot mix plant


Air / Noise Pollution

Soil Pollution




Soil Pollution √

68







14. Haulage of machinery Air / Noise Pollution

Soil Pollution



Soil Pollution √





Soil Pollution √





13. Cleaning of foundation drain and porous drain




4. Blasting



7. Labour Camps


Soil Pollution √


69



9. Hot mix plant

10.Concrete mixture and heavy pumps



Soil Pollution √






Soil Pollution √



Soil Pollution √





Soil Pollution √





70


Appendix-VD

Form SC-4: Screening and Categorization of Components

Sl. No

Environmental and Social Components

A B C




4. Blasting

5. Dredging/Desilting of reservoir


7. Labour Camps √

8. Heavy machinery √

9. Hot mix plant √

10. Concrete mixture and heavy pumps √

11. Material handling and storage √


13. Tree felling/ vegetation clearance √

14. Haulage of machinery √

15. Debris Disposal √

16. Transport of materials √

17. Small tools and pumps √

18. Sheds to keep machines and tools √

71


Appendix-VE

FORM SC - 5: SCREENING FORMAT FOR IDENTIFICATION OF SUITABLE MITIGATION MEASURES

Sl. No Compo nents

Potential Impacts

Mitigation Measures Executing Responsi

bilities

Supervising Responsibilities

Monitoring Responsibilities

Implementation Phase

1. Labour Camps

Worker/ Local people exposure

Locate handling sites away from populated areas

Follow proper operation and handling measures to minimize exposure

Provide prior warning /signals for blasting

Provide sirens in vehicles to avoid any collision with human/animals

Organise awareness programs on environmental resource management

Organise Health camps Child labour must be strictly

prohibited Provide signages near

construction sites and approach roads

Contractor Dam site in-charge

SWRD

Impact on Human health, especially workers working at construction sites (Labour Camps)

Routine medical check up of Field staff and labours

Provision of potable drinking water at site

Provision of proper sewage and waste disposal system. Sanitation facilities have to be provided at the camp sites.

Awareness program on HIV aids and other communicable disease may be provided to the work force.

First aid facilities to be provided at the construction camps. Any case of disease outbreak may be immediately subjected to medical treatment. Mosquito repellant to be provided to the labors such as odomas, coil and sprays. The camps may maintain cleanliness and hygienic condition.

Proper ventilation may be provided in labour camps


SWRD/ Public Health Centre

72


Sl. No Compo nents

Potential Impacts


bilities



Sufficient fuel may be provided to the work force at campsite. Alternate arrangement for fuel such as provision of LPG, Kerosene etc. to be provided to the camp

Head phones, ear plugs to be provided to the workers at construction site.

All workers employed on mixing of asphaltic material, cement, lime mortars, concrete etc. may be provided with protective footwear and protective goggles. Workers involved in welding work may be provided with welder’s protective eye shields

Adequate precaution must be taken to prevent danger from electrical equipments

2. Heavy Machinery


Air pollution control measure like water sprinkling

Limit hours of operation in populated areas

Use of barriers to reduce exposure

Plants, machinery and equipment may be handled so as to minimize generation of dust.

All crusher used in construction should confirm to relative dust emission devises

Low emission construction equipment, vehicles and generator sets may be used

Air quality monitoring may be conducted at construction sites.



Soil Pollution Collection and recycling of lubricants

Measures to prevent accidental spills



Worker/ Local people exposure





Organise awareness programs on environmental resource



73


Sl. No Compo nents

Potential Impacts


bilities



management Organise Health camps Child labour must be strictly



3. Hot Mix Plant















Worker/Local people exposure










SWRD/ SPCB

4 Concrete Mixture and Heavy




Use of barriers to reduce

74


Sl. No Compo nents

Potential Impacts


bilities



Pumps exposure Plants, machinery and equipment

may be handled so as to minimize generation of dust.






Worker/Local people exposure









5. Material Handling And Storage











75


Sl. No Compo nents

Potential Impacts


bilities







Worker /Local people exposure











6. Tree Felling, Vegetation Clearance


It is a direct, short term impact; Irreversible in nature; Severity is low; Insignificant Impact on Livelihood

Carry plantation work on open sites

Do not dump waste along settlement or access route

Frame Muck disposal program Frame quarry & borrow area

rehabilitation program Develop green belts along

approach road On completion of the works all the

temporary structures may be cleared away, all rubbish disposed, excreta and disposal pits or trenches filled in and effectively sealed off and the whole site

Dam Site In-charge

State Water Resource Dept. (SWRD)


Impact on Flora

Frame compensatory afforestation plan

If any rare and endangered species present in the area frame conservation plan for the species

Encourage farming of medicinal plants found in the area

Distribute fruit plants grown in the region

Plantation with native species along dam periphery, approach road and colony area


SWRD/ State Forest Dept

76


Sl. No Compo nents

Potential Impacts


bilities



Protection/fencing of planted area, provision of guard for three year

Location of camp away from forest area.

Soil Erosion Limitation of earth moving to dry periods

Protection of vulnerable areas with mulch

Protection of drainage channels with beams, straw or fabric barriers

Installation of sedimentation basins

Seeding or planting of erodible surfaces as soon as possible


SWRD

7. Haulage of Machinery















Worker /Local people exposure







prohibited



77


Sl. No Compo nents

Potential Impacts


bilities



Provide signages near construction sites and approach roads.

8. Debris Disposal










SWRD/ SPCB

Water Pollution (Surface Water)

Dump solid waste in specified place to minimize contamination of water

Dump wastewater in authorized locations and after treatment


SWRD/ SPCB


Measures to prevent accidental spills.



Trucks Traffic increase

Avoid traffic in populated areas as much as possible

Install speed breaker and signages near settlements

Roadside plantation


SWRD


It is a direct, short term impact; Irreversible in nature; Severity is low; Insignificant Impact on Livelihood

Carry plantation work on open sites

Do not dump waste along settlement or access route

Frame Muck disposal program Frame quarry & borrow area

rehabilitation program Develop green belts along

approach road On completion of the works all the

temporary structures may be cleared away, all rubbish disposed, excreta and disposal pits or trenches filled in and effectively sealed off and the whole site

Dam Site In-charge



9. Transport of



Limit hours of operation in



78


Sl. No Compo nents

Potential Impacts


bilities



Materials populated areas Use of barriers to reduce

exposure Plants, machinery and equipment

may be handled so as to minimize generation of dust.








Trucks Traffic increase


Install speed breaker and signages near settlements

Roadside plantation


SWRD/ SPCB

10. Small Tools and Pumps











11. Sheds to keep Machines and Tools










SWRD/ SPCB

79


Sl. No Compo nents

Potential Impacts


bilities



Post Implementation Phase

1. Increased Traffic/ Operation of Heavy Machinery for Regular Maintenance etc.


Specific air and noise pollution control measure to minimize impact on environment.

Periodic air quality monitoring

External Agency appointed by SWRD

Dam site in-charge

SWRD/ SPCB

Water Pollution (Surface Water)

Control oil spillage Setup a covered place for

operation and handling of oil to stop contamination

Periodic water quality monitoring


Dam site in-charge

SWRD / SPCB

Soil Pollution Control oil spillage Setup a covered place for

operation and handling of oil to stop contamination

Soil quality testing at least once a year


Dam site in-charge

SWRD / SPCB

Worker/Local population Exposure

Arrange mask for generator operator

Use modern device to reduce smoke generation


Dam site in-charge

SWRD

Disturbance to Fauna

Fencing is required on the both side of the road to avoid accident in forest area

Use of sign boards on the road side to avoid accident


Dam site in-charge

SWRD/ State Forest Dept

Increased Traffic


Follow precautionary measures to avoid accident

Install speed breakers and signages near settlement


Dam site in-charge

SWRD

80


FORM:VI – IMPLEMENTATION ARRANGEMENT 1. Civil Works-Main Package:

(a) Work Components

(For each work component details are as under separate number)

(b) Procurement Method: NCB

(C) Estimated Cost of Package (in Rupees): 1369,49,000

2. Civil Works-Other Packages:

Sl No. Description Procurement

Method Estimated Cost (Rs.)

1 Repairs/ replacement of shutter with rubber seals

Shopping 47,00,000

2 Repairs/ renewal of hoisting arrangements Shopping 23,00,000

1) Strengthening the Earth Dam 2) Repairs to revetment/ rip -rap in u/s face 3) Repairs to the existing damaged portion of chutes and Parapet wall 4) Repairs to Toe Drain. 5) Turfing on D/S 6) U/S face treatment with synthetic sealant. 7) Spillway treatment 8) Reaming the drainage shaft 9) Vertical grouting 10) Uplift pressure gauge 11) Retaining wall at upstream of Perungal Head sluice 12) Special repairs to approach road to dam and road on top of dam 13) Special repairs to Service road to gallery and toe drain etc 14) Repairing, renewing and providing the necessary electrical arrangements 15) Standby generator 16) Drainage pumps 17) Fire extinguisher

81


3. Procurement of Goods:

Sl No. Description Procurement

Method Estimated Cost (Rs.)

1 Instrumentation shopping 10,00,000 2 Solar Energy system shopping 50,00,000 3 Automatic Weather station shopping 10,00,000 4 Communication facilities – LAN - WAN shopping 8,40,000 5 Automatic Digital Water level Recorder shopping 35,00,000

4. Consultancy Assignment:

Sl No. Description Procurement Method Estimated Cost (Rs.)

1 NIL NIL NIL

5. Implementation Timeline:

a) Overall Phasing of Project Implementation:

Proposed Starting of implementation: 21/10/2013

Proposed Ending of implementation: 20/10/2015

Implementation Duration (months): 24

(b) Timeline phasing of implementation:

Sl. No.

Description From (Month/Year)

To (Month/Year)

Status of Procurement

Process 1 Civil Work – Main Package October 2013 October 2015 Tender to be

called for. 2 Civil Works –Other Work

October 2013 October 2015

3 Procurement of Goods

January 2014

4 Consultancy Assignment

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dam rehabilitation and improvement project (drip)the manimuthar dam is constructed across manimuthar...

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